Nuclide reference
Ru-106 — Ruthenium-106
The half-life of Ru-106 is 1.0179 years. Main decay mode: β⁻ decay to Rh-106 (100%).
Identification
- Element
- Ruthenium (Ru)
- Atomic number Z
- 44
- Mass number A
- 106
- State
- Radioactive
Key quantities
- Half-life
- 1.0179 years
- Specific activity
- 1.226e+14 Bq/g
- Gamma constant Γ (H*(10))
- 0.03336 µSv·m²/(MBq·h)
- Dose rate, 1 GBq at 1 m
- ≈ 33.4 µSv/h
- A1 / A2 for transport (SSR-6, НП-053-16)
- 0.2 TBq / 0.2 TBq
- D-value (НП-067-24)
- 0.3 TBq
Decay modes
- β⁻ decay → Rh-106 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 511.861 (Rh-106) | 20.4 |
| 621.93 (Rh-106) | 9.935 |
| 1,050.41 (Rh-106) | 1.559 |
| 616.22 (Rh-106) | 0.7548 |
| 873.49 (Rh-106) | 0.4386 |
| 1,128.07 (Rh-106) | 0.4039 |
| 1,562.25 (Rh-106) | 0.1632 |
| 428.4 (Rh-106) | 0.07058 |
| 21.177 (Rh-106) · X-ray line | 0.06172 |
| 1,194.54 (Rh-106) | 0.05732 |
Includes daughter nuclides in equilibrium: Rh-106 (yield per decay of Ru-106); the emitting nuclide is in brackets. Equilibrium is reached in about 3.5 min.
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 39.4 | 100 |
| 3,545 (Rh-106) | 78.6 | |
| 2,411.3 (Rh-106) | 10 | |
| 3,033.1 (Rh-106) | 8.1 |
For β⁻ the endpoint (maximum) energy of the spectrum is given. ENDF/B-VIII.0.
Related calculators
Reference data vs computed valuesHalf-life, gamma lines and D-value are reference data (ENDF/B-VIII.0, НП-067-24).Gamma constant Γ is H*(10) at 1 m computed from ICRP-107 spectra (NIST µ_en/ρ, ICRP-74 Table A.21) including short-lived progeny in equilibrium (e.g. Cs-137/Ba-137m, Ra-226 series); specific activity uses molar mass M ≈ mass number A.Dose rate example: point source, no shielding or scatter, Ḣ = Γ·A/r².K-series X-ray energies are from NIST SRD 128 (Deslattes et al., 2003): in ENDF/B-VIII.0 they are given to 1 % and shifted by up to 0.7 keV for heavy elements. L-series lines and all yields are ENDF/B-VIII.0.